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Dec 29, 2018
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I try to share my display trought a DVI cable, but my Os detect the screen model, but the monitor keep a black screen...
What do i need to do?

I had a ATI radeon HD 4200

G'day @Dalgorix and welcome to linux.org :)

I likely can't help you myself, but what OS are you using?

Also give us the output of

inxi -Fxz

Good luck

Chris Turner

BTW - command xrandr may be of use
Hi @wizardfromoz ,
I use Parrot Os, but most of the time is use praticly all of my OS on live USB (to keep some security) and that do the same thing on all..

'trought the time I install "inxi" my external monitor show my desktop screen, but like the old tv when you get a low signal.

sorry I'm not good in english.
Xandr command get:
└──╼ $xrandr
Screen 0: minimum 320 x 200, current 2806 x 900, maximum 8192 x 8192
VGA-1 connected 1440x900+1366+0 (normal left inverted right x axis y axis) 408mm x 255mm
   1440x900      59.89*+  59.89 
   1280x1024     75.02    60.02 
   1280x960      60.00 
   1360x768      59.80    59.96 
   1152x864      75.00    75.00    70.00    60.00 
   1024x768      60.04    75.03    70.07    60.00 
   960x720       60.00 
   928x696       75.00    60.05 
   896x672       75.05    60.01 
   960x600       60.00 
   832x624       74.55 
   960x540       59.99 
   800x600       75.00    70.00    65.00    60.00    72.19    75.00    60.32    56.25 
   840x525       74.96    69.88    60.01    59.88 
   800x512       60.17 
   700x525       74.76    70.06    59.98 
   640x512       75.02    60.02 
   720x450       59.89 
   640x480       60.00    75.00    72.81    75.00    66.67    59.94 
   720x400       70.08 
   680x384       59.80    59.96 
   576x432       75.00    75.00    70.00    60.06 
   512x384       75.03    70.07    60.00 
   416x312       74.66 
   400x300       72.19    75.12    60.32    56.34 
   320x240       72.81    75.00    60.05 
LVDS-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1366x768      60.14*+
   1360x768      59.80    59.96 
   1280x720      59.97 
   1152x768      59.95 
   1024x768      60.04    60.00    59.95 
   960x720       60.00 
   928x696       60.05 
   896x672       60.01 
   960x600       60.00 
   960x540       59.99 
   800x600       60.00    60.32    59.96    56.25 
   840x525       60.01    59.88 
   800x512       60.17 
   848x480       59.94 
   700x525       59.98 
   720x480       59.94 
   640x512       60.02 
   720x450       59.89 
   640x480       60.00    59.94    59.94 
   680x384       59.80    59.96 
   576x432       60.06 
   512x384       60.00 
   400x300       60.32    56.34 
   320x240       60.05 
HDMI-1 disconnected (normal left inverted right x axis y axis)

That the respond of Inxi command:
└──╼ $inxi -Fxz
  Host: parrot Kernel: 4.14.0-parrot13-686-pae i686 bits: 32 compiler: gcc
  v: 7.2.0 Desktop: MATE 1.18.2 Distro: Parrot GNU/Linux 3.11
  base: Debian Parrot
  Type: Laptop System: Hewlett-Packard product: HP G61 Notebook PC
  v: 0492110000200C10000020000 serial: <filter>
  Mobo: Hewlett-Packard model: 363F v: 42.15 serial: <filter>
  BIOS: Hewlett-Packard v: F.13 date: 01/25/2010
  Topology: Dual Core model: AMD Athlon II M320 bits: 64 type: MCP arch: K10
  rev: 2 L2 cache: 1024 KiB
  flags: lm nx pae sse sse2 sse3 sse4a svm bogomips: 8383
  Speed: 800 MHz min/max: 800/2100 MHz Core speeds (MHz): 1: 1500 2: 2100
  Device-1: AMD RS880M [Mobility Radeon HD 4225/4250]
  vendor: Hewlett-Packard driver: radeon v: kernel bus ID: 01:05.0
  Display: x11 server: X.Org 1.19.5 driver: modesetting
  resolution: 1440x900~60Hz, 1366x768~60Hz
  OpenGL: renderer: N/A v: N/A direct render: N/A
  Device-1: AMD SBx00 Azalia vendor: Hewlett-Packard driver: snd_hda_intel
  v: kernel bus ID: 00:14.2
  Device-2: AMD RS880 HDMI Audio [Radeon HD 4200 Series]
  vendor: Hewlett-Packard driver: snd_hda_intel v: kernel bus ID: 01:05.1
  Sound Server: ALSA v: k4.14.0-parrot13-686-pae
  Device-1: Qualcomm Atheros AR9285 Wireless Network Adapter
  vendor: Hewlett-Packard U98Z062.10 802.11bgn driver: ath9k v: kernel
  port: 3000 bus ID: 02:00.0
  IF: wlan0 state: up mac: <filter>
  Device-2: Realtek RTL8101/2/6E PCI Express Fast/Gigabit Ethernet
  vendor: Hewlett-Packard driver: r8169 v: 2.3LK-NAPI port: 2000
  bus ID: 03:00.0
  IF: eth0 state: down mac: <filter>
  Local Storage: total: 312.54 GiB used: 1.16 GiB (0.4%)
  ID-1: /dev/sda vendor: Seagate model: ST9320325AS size: 298.09 GiB
  temp: 46 C
  ID-2: /dev/sdb type: USB model: USB Flash Memory size: 14.45 GiB
  ID-1: / size: 1.36 GiB used: 1.16 GiB (85.4%) fs: overlay source: ERR-102
  System Temperatures: cpu: 61.0 C mobo: N/A
  Fan Speeds (RPM): N/A
  Processes: 141 Uptime: 15h 24m Memory: 2.71 GiB used: 1007.5 MiB (36.3%)
  Init: systemd runlevel: 5 Compilers: gcc: 7.2.0 clang: 4.0.1-8 Shell: bash
  v: 4.4.12 inxi: 3.0.29
I'm assuming the additional monitor is the one with 1440x900 as resolution. And you connected it with a DVI cable. Or I guess more precise DVI-I which can transport an analog VGA signal (like its written instead of DVI-I). Therefore its not a digital signal and with higher resolution it will become blurry*. It should be adjustable in the driver - but honestly I have no idea how. ... or may be, are you sure its a DVI cable and not VGA?

The different DVI (left) and VGA (right) cables looks as following ( https://en.wikipedia.org/wiki/Digital_Visual_Interface / https://en.wikipedia.org/wiki/VGA_connector ):

If its the right one, the vga, take also a closer look on the monitor side if there is a DVI or HDMI Connection. For the Laptop it would seem than that there's only a digital HDMI left - but HDMI to DVI is no problem and doesnt even come at much higher price than HDMI-HDMI

Also here are some drivers (no direct relation to the rest of my answer but found thee anyway..)
Latest AMD closed driver .

Debian Driver may be somewhat newer... with parrot and apt the pakage should be the same (just not "atigpu witch is for even older cards

Or just if this details are of interesest: You want 1440 x 900 x 60 times per second or in other words the radeon has to convert 77760000 Pixel / second (77,75Mhz RAMDAC is needed) from its memory to an analog VGA signal. ... ok for more details id need to know the exact product type like G61-xxx (some digits)